UPD16662 View Datasheet(PDF) - NEC => Renesas Technology
Part Name
Description
Manufacturer
UPD16662 Datasheet PDF : 36 Pages
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Chip set power-ON sequence
It is recommended to turn on power in the following sequence:
VCC2 → VCC1 → input → VDD, VEE → V1, V2
Be sure to turn on LCD driving power supplies V1 and V2 last.
VCC2
VCC1
OFF
OFF
ON
ON
4.5 V
CPU I/F Note1
(A0 - A16, /CS, /OE, /WE,
/UBE, D0 - D15, /DOFF)
/RESET
VDD Note2
VEE Note2
0 s MIN. 3.3 V
0V
3.3 V
0V
0.3 VCC2
0 s MIN.
100 ns MIN.
ON
OFF
OFF
ON
V1 OFF
V2 OFF
0 s MIN. ON
ON
µPD16662
Notes 1. It is possible to input the selected pins (Pl0, PL1, DIR, MS, and BMODE) at the same time as VCC2.
2. It is not necessary to have VDD and VEE ON at the same time. VDD and VEE are the liquid crystal power
supply of row driver.
Caution Turn off power to the chip set in the reverse sequence to the turn-on sequence.
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